Answer :

The practical use of science is called TECHNOLOGY

TECHNOLOGY is 
the application of scientific knowledge for practical purposes, especially in industry.

Answer is: the practical use of science is called  is technology.

Technology is the practical application of scientific knowledge.

For example, in chemistry, technology of alcohol (from mixture of ethanol, water and some other products from yeast fermentation) and petroleum (from oil) production are based on scientific knowledge about different boiling points (physical characteristic) of components of mixture.